Reset mechanism for registers



March 27, 1956 H. N. BLlss 2,739,736

RESET MECHANISM FOR REGISTERS Filed sept. 21, 1951 I Isnventor HAQVEYBL/ss (Ittornegs March 27, 1956 H. N. BLISS RESET MECHANISM FORREGISTERS 4 Sheets-Sheet 2 Filed Sept. 21, 1951 Zmnentor HAM/EY BL/SsGttomcgs 'March 27, 1956 vH. N. Buss 2,739,736 RESET MECHANISM FORREGISTERS Filed Sep't. 2l, 1951 4 Sheets-Snee 3 7 5B 60 /r/G. 4 T6 40Gttornegs Marh 27, 1956 H, BLISS 2,739,736

RESET MECHANISM FOR REGISTERS Filed Sept. 21, 1951 4 Sheets-Sheet 4nventor HAM/EY BL/@S (Ittornegs United States Patent O 2,739,736 RESETMECHANISM FOR REGISTERS Harvey N. Bliss, Windsor, Conn., assgnor toVeeder- Root Incorporated, Hartford, Conn., a corporation of ConnecticutApplication September 21, 1951, Serial No. 247,622 17 Claims. (Cl.222-33) The present invention relates generally to liquid dispensingapparatus and, more particularly, to a mechanism for connection to thereset shaft of the register and to the pump motor of the dispensingapparatus to provide for automatic resetting of the register wheneveroperation of the pump motor is initiated. Although not limited thereto,the mechanism of the present invention is particularly useful forinstallation in dispensing apparatus in which the register is reset byoscillating movement of the reset shaft.

The object of the present invention is to provide a mechanism for use ingasoline dispensing apparatus which may be driven by the pump motor andwhich in a simple and efficient manner will actuate the resettingmechanism of the counter or register whenever the pump motor is turnedon to initiate a dispensing operation, which will operate suiiicientlyrapidly to insure that the resetting operation will not interfere withdispensing which will automatically disengage upon completion of resetand yet will be free of control of the operator or interlocked so thatresetting must be carried out to completion when initiated, and which,if desired, may be so arranged that it will shut olf if there isinterference with the resetting operation.

Other objects will be in part obvious, and in part pointed out more indetail hereinafter.

The invention accordingly consists in the features of construction,combination of elements and arrangement of parts which will beexemplified in the construction hereafter set forth and the scope of theapplication of which will be indicated in the appended claims.

ln the drawings:

Fig. l is a diagrammatic and fragmentary side View of a gasolinedispensing apparatus in which the reset mechanism of the presentinvention has been incorporated;

Fig. 2 is a fragmentary side view of the register or counter of thedispensing apparatus;

Fig. 2A is a perspective view of the interference arm mounted thereon;

Fig. 3 is a View, partially in cross section, of the resetting mechanismshowing the moving parts in position upon the initiation of a resettingoperation;

Fig. 4 is a side view, partially in cross section, of the resettinsymechanism showing the moving parts in the at rest position at thecompletion of a resetting operation and with the pump motor turned off;

Fig. 5 is a cross-sectional view taken along the line 5 -5 of Fig. 4;

Fig. 6 is a cross-sectional view taken 6-6 of Fig, 4; and

Fig. 7 is a cross-sectional view taken along the line 7-7 of Fig. 4.

Referring to Fig. l of the drawings, there is shown diagrammatically aconventional gasoline dispensing apparatus. The apparatus is containedin an elongated upright housing 10 and the various portions of theapparatus are mounted on a frame 12. As is usual in conventionalgasoiine dispensing apparatus, the apparatus includes a along the lineprime mover which, as shown in the drawings, is an electric motor 14.The electric motor 14 is connected to a pump 16 by means of a belt 18extending around pulleys 20 and 22 secured to the shafts of the motor 14and pump 16, respectively.

The pump 16 has an inlet 24 which is adapted to be connected to a source(not shown) of gasoline or other liquid to he dispensed. The outlet 26of the pump 16 is connected by a conduit 28 to a meter 30 which in turnhas an outlet 32 which is adapted to be connected to the conventionalflexible hose and nozzle (not shown) by which the gasoline or otherliquid is dispensed. As will be apparent, when the motor 14 isenergized, it drives the pump i6 which forces the liquid from the sourceof supply through the meter to the dispensing hose with the result thatthe meter output shaft 34 will be turned in proportion to the amount orquantity of the liquid dispensed.

The output shaft 34 of the meter 39 is connected to a speed changemechanism or variator 36 which may be of conventional construction andwhich in turn is connected to the counter or register mechanism Theregister or counting mechanism 38 is shown in more detail in Fig. 2 ofthe drawings and will be further described hereinafter.

The resetting mechanism of the present invention is referred togenerally by the reference numeral 40. The mechanism is adapted to bemounted on the frame 12, for exarnpie, adjacent the register or counter3S and the input shaft thereof includes a pulley 42 which may beconnected by means of a belt 44 to a second pulley 46 on the shaft ofthe pump 16. Of course, if desired, the resetting mechanism of thepresent invention could be driven directly from the pump motor 14.

The pump motor 14 is provided with the usual switch 15 by means of whichthe motor can be turned off and on. The switch 15 is connected by a`connecting rod 48 to a bell crank lever 50 which, for convenience, maybe pivotally mounted on a stud 52 on the exterior of the speed changemechanism or variator 36. The bell crank lever 50 is adapted to be movedby the operator to open and close the pump motor switch 15 as desired tocommence or terminate a dispensing operation. For convenience, the bellcrank lever 5t) may be connected to the hose hook support (not shown)whereby the pump motor may be turned on as an incident to or dependentupon the removal of the hose nozzle from the support. One end of thebell crank lever 50 is connected by a connecting rod 54 to an arm 56mounted on a shaft SS of the resetting mechanism to be described moreparticularly hereinafter.

Referring more particularly to Figs. 3 through 7 of the drawings, whichshow the details of the construction of the resetting mechanism 40, itwill be seen that the mechanism 40 is contained in a generallyectangular housing 60. The pulley 42 previously referred to as beingrotated by the belt 44, which in turn is driven by the pump 16 or pumpmotor 14, has a hub 43 which is pinned to a shaft 62 which is rotatablymounted in bearings 64 contained in a journal 66 which is bolted to anaperture 68 in the side of the housing 60 by any suitable fasteningmeans such as bolts 70. Secured to the inner end of the shaft 62interiorly of the housing 60 is a driving member 72 of a tooth clutchdenoted generally by the reference numeral 74. The movable driven member76 of the tooth clutch 74 is rotatably and slidably mounted on a shaft78 which is supported in alignment with the shaft 62 by being pinned toa boss 80 on the opposite face of the housing 60.

The clutch driving member 72 is provided with a plurality of radiallyextending shoulders 73 which may be engaged by teeth 75 on the movabledriven member 76. Accordingly, when the movable member 76 is moved tothe left, as viewed in Fig. l of the drawings, the clutch will beengaged and when the movable member 76 is moved to the right, the clutchwill be disengaged. 1n order to prevent any clicking or touching of theteeth 75 and shoulders '73 when the clutch is disengaged, which mightoccur due to endwise play in the shaft 62, the shaft 73 is provided withan axial bore 82 in which is disposed aplunger urged outwardly by acompression spring 86. Since the outer end of the plunger 84 engagesagainst the face of the driving member 72, it urges the shaft 62 to theleft, as viewed in Fig. 4, thus effectively preventing the clutch memberfrom engaging due to looseness or Aend play in the shaft 62.

The movable clutch member '76 is provided with an annular groove 77 anda pair of rearwardly extending projectionsl'9. The tail-like'projections 79 slidably eX- tend into aligned slots or notches 88 formedin the hub S9 of a worm 99 which is freely rotatably mounted on theshaft 78. The lengths of the projections 79 and slots 8S are such thatthe movable member 76 of the clutch l will be in driving engagement withthe worm 9i) regardless of its axial position, thus insuring that itwill drive the worm 9d when moved to engaging position.

The means for engaging and disengaging the clutch 74 is a lever arm 92having a central hub 94 which is rotat- L,

ably mounted on a stud 96 extending between the end plates of thehousing 69. Extending downwardly from the hub 94 on opposite sides ofthe movable clutch member 76 are a pair of arms 95 and 97. Mounted onthe extremities of the arms 95 and 97 are rollers 98 which are rotatablymounted on studs 99 extending inwardly from the arms w95 and 97. Therollers 98 engage in the annular groove 7'7 in the movable clutch member76 so that, when the lever arm 92 'is pivoted in a clockwise direction,as viewed in Fig. 4 of the drawings, the clutch will be 'engaged and,conversely, when the lever arm 92 is pivoted in a counterclockwisedirection, the clutch will be disengaged.

Cooperating with and in engagement with the worm 9d is a worm wheel 100which is lixed to a transverse shaft 102 extending outwardly through theside plate of the housing 6i). The worm wheel 100, of course, is adaptedto be rotated by the worm 90 whenever the clutch 74 is engaged. Theouter end of the shaft 102 which extends outwardly from 'the housing 60is adapted to be connected to the resetting shaft of the computer orregister. in the specific embodiment shown, the outer end of the shaft1112 nas fixed thereto a crank 194 which is connected by a connectingrod 106 to a crank 10S connected to the reset shaft 110 of the register38, whereby an oscillating movement is imparted to the reset shaft 11)upon each rotation of the shaft 102. If desired, however, a belt orchain drive could be substituted between the register and resettingmechanism in order to turn the resetting shaft 119 in a singlecontinuous direction, which .Y

is necessary in vsome types 'of registers.

In the embodiment 'shown 'in the drawings, the mechan-ism is so arrangedvthat when Athe clutch 74 is engaged, the worm wheel i) will be turnedone complete revolution and then the clutch 74 will be Yautomaticallydisengaged. In order to control the clutch operating 'arm 92, there isprovided a rotatabie 'disc or plate 112 which is coaxially mounted Vinside-by-s'ide relationship with the worm wheel 10G on the shaft 102 andthis plate 112 carries adjacent its periphery a roller 114 which, whenthe Yplate 112 is rotated to the position show-n in Fig. 4 of vthedrawings, will cai'n the clutch actuating 'arm 92 to the clutchdisengagi-ng position. The vclutch actuating arm 92 is biased in aVclutch engaging Adirection by means of a vspring 116 fastened to theouter end of arm 92 and anchored at its other end on the housingit). Thefunction of the spring 116 is to cause the clutch 74 to beco'me engagedwhenever the roller 114 is jmoved from the camming lposition l'shown inFig. '4 "of the drawings.

r.Ehe plate V112 lis adapted to be `'driven by the 'worm wheel through alost motion connection consisting of a laterally projecting pin 118 onthe plate 112 which extends into an elongated slot 120 in the adjacentouter surface of the worm wheel 100. The function of the lost iotion onpin and slot connection just described is to permit the plate 112 to berotatably advanced ahead of the worm wheel 190 so as to permit the leverarm 92 to move to clutch engaging position while at the same timeinsuring, after a brief time interval, that the plate 112 wiil bepositively driven by the worm wheel 100 so that, at the completion ofone turn of the worm Wheel 169, the roller 114 carried by the plate 112will cam the clutch operating arm 92 to clutch disengaging position,thus halting the operation of the mechanism.

For convenience of manufacture, there is fixed to the side of the wormWheel 100 intermediate the Worm wheel and the plate 112 a spacer plate122 which has a notch 124 in its periphery which corresponds andregisters with the slot 120 formed in the face of the Worm wheel 199.What notch 124 does, in effect, is increase the depth of the slot 120facilitating manufacture of the device and avoiding the necessity forclose tolerances. The spacer plate 122 also has a peripheral notch 126so that it will not interfere with the movements of the roller 114previousiy referred to as being mounted on the plate 112. So far as theinvention is concerned, the presence of the spacer plate 122 may beignored.

in order to initiate the operation of the resetting mechanism, there isprovided the transverse shaft 5S previously referred to as carrying thelever arm 56 which is connected by a connecting rod 54 to the bell crankS9. As a result, the shaft 53 is adapted to be rotated lin acounterclockwise direction whenever the pump motor is turned on.Conversely, the shaft 5i? inust be rotated in a clockwise directionwhenever the 'pump'motor is turned ofi.

Within the casing dit and `in radial alignment with the disk 112 is apivoted lever in the form of a plate 139 which is fixed to the shaft 58referred to above. Carried by the plate 139 is a starting pawl 132 whichis pivotally mounted on the plate at 134 and which is biased in aclockwise direction, as viewed in Fig. 4, by means of spring 136. Thenose 138 of the pawl 132 is oifset as shown so that it also lies in theplane of the plate 112. Adjacent the roller 11.4 is a notch 140 in theperiphery of the plate 112 which will receivey the nose of the pawl 132.The notch 14% is in pawl-receiving position when it is in the positionshown in Fig. 4, i. e. with the roiler 114 camming the 'clutch operatingarm 92 to clutch disengaging position.

As a result of the arrangement described, when the shaft 5S and hencethe plate 131i are rotated in a counterclocliwise direction to theposition shown in Fig. 3, the resulting travel 'of the pawfl 132 on theplate 130 will rotatably advance the plate 112 so that the roller 114will ride off the offset end of the clutch actuating arm 92 and permitthe spring 116 to move the arm 92 to clutch engaging position. Since inthe specic embodiment shown in the drawings, the aforesaidc'ounterclockwise rotation of shaft 58 takes place simultaneously withthe closing of the motor switch 15, the pulley 42, shaft 62, and clutchmember 72 will immediately begin to rotate. Accordingly, the engagementof the clutch 74 will impart movement to the worm wheel 10). The wormWheel 19t) will continue to rotate without driving the plate 112,(ignoring friction), until the trailing end o-f the slot 129 engages thepin 11S carried by the plate 112 whereupon the plate 112 is rotated insynchronism with the worm wheel 100 until the roiler 114 makes acomplete circuit and again engages against the edge of the clutchactuating arm 92, causing the clutch to become disengaged.

The worm '91) and worm wheel 169 provide a desirable speed ratio wherebythe reset shaft of the register is turned at a desired rate of speedwhich preferably is suiiiciently rapid so that resetting of the registerwill be accomplished during "a brief time interval. A brief timeinterval i111- sur'es that the operator Awill not have an opportunity todispense any gasoline before the register has been reset or at leastwill not be able to dispense an appreciable quantity. In any event, theoperator would not be under any incentive to dispense before resettingis completed, since the quantity so dispensed would not be registeredand thus would not be charged against the customer.

On the other hand, it would be a disadvantage to permit the operator toturn the pump motor on and off in such succession that the resettingmechanism would not have sufficient time to complete the resettingoperation. To avoid this possibility, the plate 130 is so arranged thatthe edge 131 of the plate 130 will cooperate with the plate 112 toretain the plate 130 and hence shaft 58 in the rotated position shown inFig. 3 of the drawings for a sufficient length of time to insurecomplete resetting. As will be noted, the plate 112 has a latchingshoulder 113 extending approximately halfway around the plate 112 whichwill engage against the edge 131 during the first half turn of the plate112 and thus latch the plate 130 in the on position and prevent theoperator from turning the pump motor off. Thereafter, the pump motor maybe turned off but the inertia of the pump motor is such that theapparatus will coact to completion of resetting before the movementthereof is entirely stopped.

As previously mentioned, the shaft 102 may be connected to the resettingshaft of the register in any desired manner. The mechanism isparticularly suitable for registers of the type having a reset shaftwhich is oscillated in order to reset the register to Zero. With such aregister, it is an advantage that a connecting rod, such as theconnecting rod 106, may be employed in place of a belt or chain driveconnection to the reset shaft.

A register 38 of the type having a reset shaft which is oscillated inorder to reset the register to zero is illustrated generally .in Fig. 2of the drawings.v Referring to Fig.- 2 of the drawings, it will be seenthat the register 38 includes a frame 140 on the opposite ends of whichare mounted transverse number wheel supporting shafts 142 and 144.Disposed on the shafts 142 and 144 in sideby-side relationship are thenumber wheels 146 for registering the quantity of liquid dispensed andthe cost thereof. The means for driving the number wheels, for transiferring the count from the number wheels of lower order to the numberwheels of higher order, and for disconwill not be described herein sincethe same forms no part of the present invention and an understanding ofthe same is not necessary in order to understand the present invention.

The register 38, as illustrated in Fig. 2 of the drawings, is of thetype employing a heart-shaped cam reset. For this purpose each of thenumber wheels is provided with a heart-shaped cam 148 fixed to the sideof each wheel and by means of which the wheel may be returned to zero.Mounted on auxiliary transverse shafts 150 and 152 are cam actuatingarms 154 referred to in the claims as reset arms, the shafts 150 and 152being referred to as reset arm shafts. The operation of the camactuating arms 154 is such that, when the shaft 150 is turned in acounterclockwise direction and the shaft 152 is turned in a clockwisedirection, the free end of each cam actuating arm 154 will engage uponthe periphery of its cooperating heart-shaped cam 148 and rotate theassociated number wheels to zero.

As previously mentioned, the register 38 is adapted to be reset byoscillating the reset shaft 110. For this purpose there is fixed to thereset shaft 110 a relatively long crank 108 which is connected by theconnecting rod 106 to the crank 104 on the shaft 102 of the resettingmechanism 40. As a result of this connection, when the drive shaft 102of the resetting mechanism is rotated through one revolution, thusrevolving the crank 104, the crank 108 is first pulled down in aclockwise direction and is then returned in a reverse direction tooriginal starting position.

As shown in dotted lines in Fig. 2 of the drawings, there is provided adriving gear 156 which is freely mounted on the reset shaft but which isadapted to be driven when the reset shaft is turned by reason of a coilspring 158 which has one end thereof secured to the shaft and which hasthe other end in engagement with the gear 156. The purpose of the drivebetween the shaft 110 and the gear 156 through spring 158 is to permitthe shaft 110 to rotate independently of movement of the gear 156 in theevent that turning movement of the gear 156 is prevented.

The gear 156 is in mesh with a gear segment 160 which is fixed to atransverse shaft 162. Also fixed to the shaft 162 is a two-segment gear164 having a portion 164th in mesh with a gear segment 166 fixed to theshaft 152 previously referred to. The remaining portion 164b of thetwo-segment gear 164 is in mesh with a two-segment gear 163 which inturn meshes with a gear segment 170 fixed to the transverse shaft 150.The function of the gear train just described is to cause the shafts and152 to be rotated counterclockwise and clockwise, respectively, when thereset shaft 110 is rotated in a clockwise direction during the firsthalf of a resetting operation. Conversely, when the reset shaft 110 isrotated in a reverse direction (counterclockwise) during the second halfof the resetting operation, the shafts 150 and 152 will be rotated in aclockwise and counterclockwise direction, respectively. The spring drive158 is sufiiciently strong so that during a normal resetting operationthe cam actuating arms 154 will be driven with suflicient force to resetthe number wheels to zero. In the event resetting of one or more of thenumber wheels to zero is prevented by the circumstance that one or moreof the heart-shaped cams is so disposed that the point thereof isengaged by the cooperating cam actuating arm 154, movement of the geartrain will be prevented but this will not prevent turning of the resetshaft 110 by reason of the resilient connection provided by the spring158, as previously described.

ln the event that resetting of the register to zero is prevented for thereason given before, it is desirable that provision be made toautomatically turn off the pump motor so that the operator will berequired to again turn on the pump motor in order to carry out adispensing operation which, as previously described, will also cause theresetting operation to be repeated. It has been found that thepositioning of the heart-shaped cams which would prevent resetting is socritical that stoppage occurs only very rarely and that any slightamount of vibration such as a repetition of the resetting operation willinvariably be sufficient to jar the mechanism from obstructing position,thus permitting resetting to go to completion during the subsequentresetting operation.

To provide the desired automatic turn-olf of the pump motor in the rareevent that complete resetting is prevented on the first attempt, thereis included in the mechanism, in accordance with the invention, aprojecting arm 172 secured to the hub of the crank 108. Also there isprovided a crank 174 having a hub 175 freely mounted on the outer end ofshaft 150 and provided with an outwardly projecting arm 176. Theprojecting arms 172 and 176 are in the same plane and of such lengththat the arm 176 will interfere with the travel of the arm 172 when thearm 176 is in the position shown in Figs. l and 2 of the drawings. Asbest shown in Fig. 2A of the drawings, the projecting arm 176 isnormally held in the obstructing position referred to by a coil spring178 which is disposed on the hub 180 of the gear segment with the endsof the spring 178 extending on opposite sides of pins 182 and 184 on thesegment 170 and arm 176, respectively. During a normal resettingoperation in which resetting goes to completion'the gear Vsegment i7@will be rotated in a counterclockwise direction and, by reason of theconnection with crank 1'74 and projecting arm l76 through spring 173,will also pivot the latter to non-obstructing position. In the eventthat resetting cannot go to completion, the rotation of gear segmentlf'tl will not be sufficient to pivot the arm i175 to non-obstructingposition. In that event the projecting arm l'f/Z on the reset crank 168will wipe past the projecting arm 176 to the position shown in dottedlines in Fig. l of the drawings, this being permitted by the resilientmounting of arm ifi/'o by spring 178. Then, on the return movement ofcrank lil to complete the operation, arm 172 again wipes past arm l',this time pivoting arm l-d in a clockwise direction.

The outer end ot the cranlt ll is provided with a stud 186 having atransverse bore Il which slidably ceives one end of a connecting rodSitio. Connecting i d l is connected at its otherv end to the crankwhich, in turn, is connected to the motor switch through connecting rods52'; and i8 and bell crank dit. The upper end of the connecting rod lettadjacent to where it extends through the stud ibo is provided with apair of adjustable stopnuts As a result, the crank 174 can be freelyturned counterclocktvise direction (such as during a normal resettl uponthe connecting rod However, it the crank 17dis rotated in a clockwisedirection, which will occur upon the return of the reset cranlt M8 tooriginal position if there is a stoppage in the resetting operation aspreviously described, the stud 136 will engage against the stopnuts El),thus tensioning lthe connecting rod 188 and turning o the pump motorswitch 15. The operator is thus compelled to again turn on the pumpmotor switch in order to carry out the dispensing operation whichautomatically repeats the resetting operation. The repeated resettingoperation invariably will go to completion and then dispensing can becarried out in the usual manner.

As many changes could be made in the above construction and manyapparently widely diierent embodiments of this invention could be madewithout departing from the Scope thereof, it is intended that all mattercontained in the above description or shown in the accompanying draw' sshall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the language used in the followingclaims is intended to cover all of the generic and specic features otthe invention herein described and all statements of the scope of theinvention which, as a matter of anguage, might be said to falltherebetween.

I claim as my invention:

l. ln a liquid dispensing apparatus including a pump motor and aregister having a reset shaft, a mechanism for connection between thereset shaft and pump motor to cause the register to be reset whenoperation of the pump motor is initiated comprising a clutch having adriving member connected to the pump motor, a disengageable clutchdriven member, means for disengaging the clutch driven member includinga cam, means connecting the clutch driven member and the register resetshaft including means for driving the cam, and means for advancing thecam independently of the last-named means when the pump motor is turnedon.

2. .in a liquid dispensing apparatus including a pump motor and aregister having a reset shaft, means for actuating the register resetshaft when the motor is turned on comprising a rotatable member, Vmeansfor driving the rotatable member by the pump motor including adisengageable clutch, means including a rotatable cam for disengagingthe clutch at one rotated position of the cam, a llost motion connectionbetween the cam and the rotatable member, and means for advancing thecam when the pump motor is turned on.

Lg operation) without any elect 3. ln a liquid dispensing apparatusincluding a pump motor and a register having ka reset shaft, a resetmechanism comprising a worm and worm wheel, means connecting the worm tothe pump motor including a disengageable clutch, an actuating arm forthe clutch, a cam mounted coaxially with the worm wheel for engaging thearm at one rotated position of the cam, a lost motion connection betweenthe cam and worm wheel, and means for advancing the cam to permit theclutch to engage when the pump motor is turned on.

in a liquid dispensing apparatus including a pump motor and a registerhaving a reset shaft, a reset mechanism for actuatinfY the registershaft by the pump motor comprising a rotatable member connected to thereset shaft, means for driving the rotatable memberl by the motorincluding a disengageable clutch, means ina rotatable cam fordisengagiug the clutch at one rotated p sition of the cam, a lost motionconnection between the cam and the rotatable member, and a manuallymovable member for engaging the cam to advance the cam to initiate aresetting operation.

5. in a liquid dispensing apparatus including a pump motor, a pump motorSwitch, and a register having a reset shalt, a reset mechanism foractuating the register reset shaft when the pump motor is turned oncomprising a rotatable member connected to the reset shaft, means fordriving the rotatable member by the pump motor including a disengageableclutch, means including a rotatable cam for disengaging the clutch atone rotated position of the cani, a lost motion connection between thecam aud the rotatable member, and a movable member connected to themotor switch for advancing the cam when the pump motor is turned on.

6. in a liquid dispensing apparatus including a pump motor, a pump motorswitch, and a register having a reset shaft, a reset mechanism foractuating the register reset shaft when the pump motor is turned oncomprising a rotatable member connected to the reset shaft, means fordriving the rotatable member by the pump motor including a disengageableclutch, means including a rotatable cam for disengaging the clutch atone rotated position or" the cam, a lost motion connection between thecam and the rotatable member, a pivoted lever connected to the pumpmotor switch, and a pawl on the lever for advancing the cam when thepump motor is turned on.

7. ln a liquid dispensing apparatus including a pump motor, a pump motorswitch, and a register Ahaving a reset shaft, a reset mechanism foractuating the register reset shaft when the pump motor is turned oncomprising a rotatable member connected to the reset shaft, a drivingconnection between the pump motor and the rotatable member including adisengageable clutch, a lever arm for disengaging the clutch, a cammounted on the rotatable member for limited relative movementtherebetween engageable with the lever arm at one rotated position otthe cam to move the lever arm to clutch disengaging position, and amovable member connected to the motor switch for advancing the cam fromsaid one rotated position when the pump motor is turned on.

3. ln a liquid dispensing apparatus including a pump motor, a pump motorswitch, and a register having a reset shaft, a reset mechanismcomprising a worm and worm wheel, a driving connection between the pumpmotor and the worm including a disengageable clutch, a lever arm fordisengaging the clutch, a cam mounted coaxially with the worm wheel formoving the lever arm to clutch disengaging position at one rotatedposition 'of the cam, a pin and slot driving connection between the wormwheel and cam permitting advancement of the cam relative to the wormwheel, a pawl for advancing the cam, and manually operable means foractuating the pawi connected to the motor switch.

9. ln a liquid dispensing apparatus including a pump motor, a pump motorswitch, and a register having a reset shaft, a reset mechanism foractuating the register reset shaft when the pump motor is turned onincluding a rotatable plate member iaving a latching shoulder thereon,and a pivoted lever mounted for pivoting movement through the orbit ofmovement of the latching shoulder, said pivoted lever being connected tothe pump motor switch.

10. ln a liquid dispensing apparatus including a pump motor, a pumpmotor switch, and a register having a reset shaft, a reset mechanism foractuating the register reset shaft when the pump motor is turned oncomprising a rotatable member connected to the reset shaft, a drivingconnection between the pump motor and the rotatable member including aclutch, a disc connected to the rotatable member for rotation therewithand having means thereon for disengagiug the clutch at the completion ofreset, said disc having a radially extending protuberance extendingpartially about the periphery thereof, and means connected to the pumpmotor switch for engaging the clutch when the pump motor is turned onincluding a pivoted lever mounted for pivoting movement through theorbit of movement of said protuberance.

l1. In a liquid dispensing apparatus including a pump motor, a pumpmotor switch, and a register having a reset shaft, a reset mechanism foractuating the register reset shaft when the pump motor is turned oncomprising a rotatable member connected to the reset shaft, a drivingconnection between the pump motor and the rotatable member including adisengageable clutch, means including a rotatable cam for disengagingthe clutch at one rotated position of the cam, a lost motion, connectionbetween the cam and the rotatable member, a manually movable memberconnected to the pump motor switch for advancing the cam when the pumpmotor is turned on, and means for preventing reverse movement of themanually movable member to open switch position during predeterminedmovement of the rotatable member.

l2. in a liquid dispensing apparatus including a pump motor, a pumpmotor switch, and a register having a reset shaft, a reset mechanism foractuating the register reset shaft when the pump motor is turned oncomprising a rotatable member connected to the reset shaft, a drivingconnection between the pump motor and the rotatable member including adisengageable clutch, means including a rotatable cam on the rotatablemember for disengaging the clutch at one rotated position of the cam, alost motion connection between the cam and the rotatable member, apivotal lever connected to the pump motor switch for advancing the camwhen the pump is turned on, and means on the cam for preventing reversemovement of the lever to open the pump motor switch during predeterminedmovement of the cam.

13. In a liquid dispensing apparatus including a pump motor, and aregister of the heart-shaped cam type having a reciprocal reset shaft, areset mechanism driven by the pump motor for reciprocating the registerreset shaft, means for initiating the operation of the reset mechanismwhen the pump motor is turned on, and means for turning off the pumpmotor when reciprocation of the reset shaft does not reset the registerto zero.

14. In a liquid dispensing apparatus including a pump motor, and aregister of the heart-shaped cam type having a reciprocal reset shaftand ix reset arm shaft, the combination comprising a reset mechanismdriven by the pump motor for reciprocating the register reset shaft,means for initiating the operation of the reset mechanism when the pumpmotor is turned on, and means responsive to movement of the reset armshaft for turning off the pump motor if the register is not reset tozero.

l5. in a liquid dispensing apparatus including a pump motor and a pumpmotor switch, a register of the heartshaped cam type having a reciprocalreset shaft, a reset arm shaft and a resilient driving connectiontherebetween, a reset mechanism driven by the pump motor forreciprocating the register reset shaft, means connected to the pumpmotor switch for initiating operation of the reset mechanism when thepump motor is turned on, and means connected te the pump motor switchand operated by relative movement or the reset shaft and reset arm shaftfor dee-energizing the motor when movement of the reset arm shaft isinsuflicient to reset the register to zero.

16, ln a liquid dispensing apparatus including a pump motor and a pumpmotor switch, a register of the heartshaped cam type having a reciprocalreset shaft, a reset arm shaft and a resilient driving connectiontherebetween, a reset mechanism driven by the pump motor forreciprocating the register reset shaft, means connected to the pumpmotor switch for initiatiny operation of the reset mechanism when thepump motor is turned on, a rst lateral extension resiiiently mounted onthe reset arm shaft connected to the pump motor switch, and a lateralextension on the reset shaft for actuating the iirst lateral extensionand thus the pump motor switch when movement of the reset arm shaft isinsufiicient to reset the register to zero.

17. In a liquid dispensing apparatus including a pump motor and a pumpmotor switch, a register of the heartshaped cam type having a reciprocalreset shaft, a reset arm shaft and a resilient driving connectiontherebetween, a rotatable member connected to the reset shaft toreciprocate the same during one rotation of the rotatable member, adriving connection between the pump motor and the rotatable memberincluding a disengageable clutch, means including a rotatable cam on therotatable member for disengaging the clutch at one rotated position ofthe cam, a lost motion connection between the cam and the rotatablemember, means connected to the pump motor switch for advancing the camwhen the pump motor is turned on, a rirst arm resiliently mounted on thereset arm shaft of the register and connected to the pump motor switch,and an arm xed to the reset shaft of the register for engaging the firstarm to actuate the pump motor switch, said first arm being moved tonon-engaging position when the register is reset to zero.

References Cited in the file of this patent UNITED STATES PATENTS2,109,353 Hazard Feb. 22, 1938

